N. Markova Ruzdik1*, D.Valcheva2, D.Vulchev2, Lj. Mihajlov1, I. Karov1, V. Ilieva1
1Faculty of Agriculture, “Goce Delchev” University, 2000 Shtip, Republic of Macedonia 2Institute of Agriculture, 8400 Karnobat, Bulgaria
Abstract. The aim of this paper was to determine the correlation between qualitative-technological traits and grain yield, as well as, the variability of these properties in two-row barley varieties. The experiment was conducted during the period of 2012/2013 and 2013/2014 on the research fields of the Faculty of Agriculture, in two different locations in the Republic of Macedonia, Ovche Pole and Strumica. The total numbers of 21 genotypes were used as research material, of which 5 were Macedonian, 2 were Croatian, 2 were Serbian and 12 genotypes originate from Bulgaria. The following qualitative-technological traits were analyzed: protein content, uniformity of I class grains, weight of 1 000 grains, hectoliter mass, water sensitivity and soaking degree. In both experimental years, the average values for grain yield for tested genotypes in Strumica location were higher, compared with genotypes examined in Ovche Pole location. In both locations significant and positive correlation was established between the grain yield and weight of 1 000 grains. Using the principle component analysis, it was determined that as far as qualitative traits and grain yield were concerned, two main components with cumulative percent of variation of 69.63% were identified for genotypes analyzed in Ovche Pole. Also for tested genotypes grown in Strumica were obtained two main components with cumulative percent of variation of 59.75%. The most suitable for growing in Ovche Pole location were the genotypes: Perun, Lardeya, Asparuh, Sajra and Odisej and for Strumica location genotypes: Hit, Line 1, Lardeya, Kuber, Sajra and Devinija.